Separable beater for mixing devices



July 18, 1933. P. J. FITZGERALD SEPARABLE BEATER FOR MIXING DEVICES Filed April 19, 1932 Patented July 18, 1933 PATRICK J. FITZGERALD, FTORRZINGTON,CONNECTICUT, assren'oa TOTIHE rrrz- GERALD MANUFACTURING COMPANY, or ronn'meromoonnno'rlovr, A oonrona- TION OF CONNECTICUT 1 snrnnnennnnA'rnnronivrrknve nEvIc sq 3 H Application filed ,April 19,

' This' invention relates to aformof construction of a separable beater which may be employed with mixing devices of'thetype disclosed in my coending application Serial N0. 543,921, filed une 12, 1931.

' Onefeature of the present invention is the provision of a separable beater which may be constructed offewparts and in simple manner, and which is rigid during service.

Another feature of the present invention is the provision ofa separable' beater having paddle members with projections for engaging with flat "ortionslof a driving and supporting spindlefwhereby the paddles are locked tot-he spindlefonrot-ation. r

A furtherfeature of the present inventionis the provision of a separable beater including "a driving spindle which is, deformed to provide driving projections'for establishing operative relationship" with a slotted 'd rivin sleeve on the mixing devicelVith these and otherobjects inviewas will appear in the course of the following specification and claims,an illustrative form of practicing the invention is set forth on the accompanying drawing, in which:

Figure 1 is a diametrical section along the axis of a beater according to the present in vention.

Fig. 2 is a similar view at right angles to that of Fig. 1, and showing the parts prior to'the assembly of the spindle therewith.

Fig. 3 is a detail sectional view substantially on line 33 of Fig. 1. 1

Fig. 4 is a detail sectional view, on a larger scale, substantially on line 44@ of Fig. 1. M Fig. 5 is a similar detail sectional View,

substantiallyon line 55 of Fig. 1.

Fig. 6 is a diagrammatic view, showing the manner of forming the driving projeo tions. 7 y j a In the drawing, a spindle 6.0 is provided with a retaining groove 62 intermediate its length, the driving projections 61 which are preferably located belowthe retaining groove 62, and with the flattened-portions 64 adjacent the lower. end for establishing adriving relationship with the paddles, as willbe described hereinafter: each of these flattened portions is preferably formed by cutting two four grooves at their 7 p v ly and leave a rectangular section of'the 1932, Serial b06365, J

' pairs of parallel diagonal rooves the spindle," each grooveflbeing o? V-shape, and. the

" bottoms extend cho'rdalspindle Fig. 4)}

' The beater portion propericomp'rises metal strips offarcuate section for r gidity,

by bending astrip intou shape 'andapproxr matingthe ends while holding them substan v proximation,

ing the material (Fig, 1), adjacent theends pa. ,dles which v are preferably fo'rmed ofsheet the strips are provided with inx w'ardprojec'tions 15, preferablybydePress' thereof; The two strips thus formedare' shown as non-identical] as one passes. above the" o her at the bottom of the beater. The

formed paddle strip passes beneaththe formed paddle strip 11. 'The two paddle strips are joinedtogeitherby forming aneyelet 14 ortubular portionalong the axis of the device, directed"tow ard, and

adapted to be passed through a corresponding aperture formed in the other paddle strip 11.

It is preferred, as illustrated, to form this eyelet or tube in the lower strip, so that upon clinching the inner end of the eyelet into position as strips together, the irregularities of the device are on the'inside,'and thereby a smooth botshown in Fig. 3, to hold the two tom isprovided for the beater as a whole.

The eyelet is'inserted through the opening of the other strip and thenclinched as shown in, Fig. .3, thus yielding a" partial assembly of the type shownin Fig. 2, where' th'e four upper ends of the strips are brought together i sleeve having and as a whole provide a split substantially the same internal diameter as the external diameter of the spindle that is Section conforming to thespindle 60. and extending through an arc of 9.0 degrees. The'spindle 60 may be manufacturedby cutting rod material to the appropriate each of the strips has at its end an arcuate length and forming the holding groove .62 v

annularly therein, and cutting the driving flat portions 64:. Either prior to or subse-I quent to such operations, the spindle is provided at a predetermined distance from its ends with the driving projections 61. It is preferred to provide these driving projections 61 by squashing'the spindle transversely in the manner indicated which the spindle blank 60a is placed upon a matrix M having a groove ofcylindrical conformation to receive the body of the spin dle'at points axially removed from the projection. 61 and provided at the locations for the projection 61 with inwardly extending forming portions 21.

A die D is employed in conjunction therewith, having a groove 22 ing beyond the corresponding to the groove 60' and the forming portions 23 corresponding to the opposite forming portions21. Asthe die is brought down upon the rod, it causesa crushing and lateral forcing of themetal from thesimple cylindrical shape into the X-shape shown in Figs. 5 and 6, with the projection .61 extendgeneral cylindrical surface of the spindle 6 e 1 Such a spindle is then slipped into the partial assembly of Fig. 2 until the projections 15 fit into the groove-'64: (Figs. 1 and 1) and then. a ferrule 30 is forced along the spindle 60 and over the upper ends of the paddle strips: a tight driving fit is thus accomplished, whereby a rigid assemblyis produced between the spindle and the paddle strips. i

' In use,the separable the structure shown in my co-pending application Ser. No. 543,921 as the spindle 60 slips into the driving sleeve .39 and is held against downward by the engagement of the hall 4.9 in the groove 62, this ball itself being held in position by the clutch cone 46. then in this beater operates with position, the driving in Fig. 6, inv

- ters Patent, is

above referred to,

dropping projections 61 occupy notches 41 formed in the lower end of the driving sleeve 39. 1

It is obvious that the invention is not limited solely to the form shown, but that it may be modified in many. ways within the scope of the appended claims. Having thus described the invention, what I claim as new and pos te points, to provide angular surfaces about the spindle, a beaterpaddle formed of a strip of sheet metal and having its center a 90 extending at right angles to the axis of the spindle and having its ends brought together into substantial. parallelism, said substan tial parallel'end portions of thepaddle being arcuate transversely to conform with the curvature of the spindle-and engaging said spindle and overlapping said cut-away portions, inwardly extending portions on said strip of metal extending into said cutawayportions, and a ferrule tightly fitting around the endsv of said strip vto prevent radial separation thereof from the spindle.

PATRICK J; FITZGERALD;

desire to secure by Let- 1 

